Home / 420,320.07-580,128.03-257,004.50

Finding the Fourth Proportional to 420,320.07, 580,128.03 and 257,004.50

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Solution

The fourth proportional to 420,320.07, 580,128.03 and 257,004.50 is: 354,718.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,320.07 : 580,128.03 = 257,004.50 : x
  2. Step 2: Convert to fraction form
    420,320.07/580,128.03 = 257,004.50/x
  3. Step 3: Cross multiply
    420,320.07x = 580,128.03 × 257,004.50
  4. Step 4: Simplify right side
    420,320.07x = 149,095,511,385.50
  5. Step 5: Solve for x
    x = 149,095,511,385.50/420,320.07
  6. Step 6: Final answer
    x = 354,718.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.